Mechanical stud-driving device



L. A. WEIL ET AL MECHANICAL STUD DRIVING DEVICE April 3, 1928.

Filed June '19, 1925 2 Sheets-Sheet 1 m 1 7 6 0 H m 2 .w .m 4 T M q. J .f K 1 2 m 3 0 1 H a l 3 7. 4 2 4 J1 n mum April 3, 1928. 1,664,442

L. A. WEIL ET AL I MECHANICAL STUD DRIVING DEVICE Hg, q

JOINT INVBN mks 2%? Tamils) Patented Apr. 3, 1928.

UNITED s'r- The object of our i ting threaded without the use 0 injury to the res PATENT o Fic Louis A. wninimii CHARLES E. WEIL, or nn'rnorr, mic neau.

' MECHANICAL STUD-DRIVING av-Ion.

a mechanical device,

threaded bolt.

Another object is to prod that can be operated by for screwing threaded stud f nvention is to produce for screwing and bolt studs into machine parts,

f hand tools, and without setuce a stud-driver power machine,

studs in, machine and that will automatically release the is to the thr in the reverse direction.

A still further objecti driver that is simple attached and detache eflicient in its operati tured at a low cost.

in construction, (1 to any threaded stud, on and can be manufacor removing the device therefrom.

A further object driver that will lock in when rotated automatically re produce a stud eaded stud therein a forward direction, and lease the stud when rotated s to produce a stud easily ects are attained in the preferred form by the construction and arrangement of 'par set forth.

Similar parts on all drawings are marked by similar numerals.

1 Fig. 1, shows the device in its assembled form, and holding a threaded stud bolt therein. I

Fig. 2, is the bottom view of Fig. 1.

Fig. 3, is a top view of Fig. 1.

Fig. 4, is a sectional view H taken on the center line of Fig. 3, and illustrates the position of the driver is beingrotated rection,

Fig.

4, showing the position of nism, when in the stud is rele thereto.

Fig. 7, isa

the relative po Fig Fig. 9, is a top view 0 Fig. 8

Fig

Fig

Fig

F g Fig bottom view 0 8, s a detail of the 12, is atop view of ts more fully hereinafter the operating mechanism when in a forward diand for locking the stud therein. 5, is a sectional view similar to Fig.

the same mechaa reverse rotation of the device,

ased therein. Fig. 6, shows a detail of the driving and the connected operating cams attached head f Fig. 6, showing sition of the operation cams.

locking cam.

f the camshown in of Fig. 8, show;

ing the drive bar attached.

in driving thimble for Fig. '11.

. 13, is the bottom view of Fig. 11.

. 1a is a side. view 0 f the cylindrical Application filed June 19, 1925. Serial 110,558,291

sleeve which incloses and retains the operating parts within the device.

We will now describe more fully the detailed construction of our device,referring to the drawings and the marks thereon.

nism therein. An internally threaded driv-' ing thimble projects from the end of the device for receiving the threaded studs there-.

in, and supported by movable locking cams which operate automatically against the end of the inserted stud, for locking and releasing the stud therein, as the device is rotated in a forward direction for driving the stud into machine parts, or reversed in detaching the devicetherefrom. v

The driving head comprises a cylindrical collar -1, having the tapered shank --2-- attached to the end thereof, and a projecting threaded stud -3 positioned on the opposite end thereof. The driving head is preferablyturned out of one solid piece of steel, and the driving spindle 2.forined to a standard. machine taper, as is now adopted and used in this class of tools, for inserting within the" power spindle of a drill press, or similar machines. The spindle is provided with a flattened end for engaging a slotted recess toprevent same from turning within the power sleeve. The threaded stud -3 is formed of a smaller diameter thanthe collar l-, providin a shoulder a thereon. The-outerv end 0 the threaded stud .3 is provided with two projecting helical cam slides -5, positioned on opposite edges of the stud body -3--, and are separated by the rectangular recess 6 which extends diametrically across the Within the outer end of the casing 7 is formed a bearing 9 and retainingshonlder -1-0-. Placed withinthe casing 7,, and adjacent to the stud cams -5 ot the driving head, is placedadise locking cam -l1, also provided with two helical cam slides 12, formed of a slope and diameter to fit and engage the stud cams 5 of thedriving head. The slide cams 12% is positioned on opposite edges of the disc -11-,'on the sameside thereof, and separated by a projecting bar tooth 13, for engaging-the slot 6 in the end of the stud. 3-. The bar. tooth l3 is much narrower than the width of the slot 6, for allowing the locking cam 11 to turn slightly along. the cams 5 and l2. On the opposite side of the disc locking cam -1l is formed a drive bar 14, rectangular in form, and extending diametrically across the face 01' the disc 11-. In the center ofthe drive bar '-14, and concentric with the disc 11., is a locking pin 15, and positioned on the axis of the disc. Outside of the locking disc ll, and .adjacent thereto, is placed the driving thimble l6 rotatably mounted in bearing -9-. The thimble.-l6-Z is a hollow cylindrical form, made oi hardened steel, and is provided with internal threads -27 therein, positioned concentric with the axis of the thimble, and the opening extending the entire length of the thimble. At one end ofthe thimble -l6 is formed a projectingsupport collar 17, being also circular in form, and concentric with thethimble cylinder-l6. Across the outer face of the collar -17 positioned diametrically thereon, is the drive slot18, rectangular in section and of a size to receive the drive bar 1 lof the locking cam 11, and

having the projecting locking pin 15 thereon, inserted within the threaded opening -27- of thedriving thimble 16. The'outside diameter of the sleeve cylinder 16-- .is of a size to fit freely Within the bearing 9- in the end of the nose sleeve -7, while the collar 17 is of a diameter to allow it vto slide within the casing 7 and engage the projecting shoulder-10- therein, and forming a rigid support for the driving thimble. The depth of the opening within the nose casing 7-, between the shoulder 10-and the open end thereof, being such as will allow approximately of an inch movement along the axis thereof of the locking disc cam 11 and the drive thimble 16, as the disc cam -11 rocks back and forth within the slot 6- of the driving head, and which space is taken up,,or adjusted by the action of the cam disc. Figs. 4: and 5 show the assembled device with the threaded stud bolt -19- inserted therein, ready for driving the stud into other machine parts. Fig.

5 shows the disc locking cam 11 rotated to the lowest side of slot -6. on the a supporting, helical cams -5, which allows the disc cam -l1 to recede slightly along the line of the axis, ing thimble 16, drawing therewith the and away from the drivdrive bar 1 41and the locking pin 15--,

jects within the threaded opening, thus holding the disc 11 and driving thimble 16- slightly apart; In operation, the shank''2.* of the driving head, is held firmly within a rotating power sleeve of an operating machine, and is. rotated-to the. right, for driving right hand threaded studs, and exerts a torsional pressure'along the stud cams 5, caused :by the resistance from the turning of thestud bolt 1.9 into machined parts, and which reacts along the driving thimble l6 and connected locking cani l1, and causing a slipping between the helical cam slides 5 and 1 2', forcing the cam -11 and locking pin 'l.5 outward and against the end of the stud bolt .19-, as shown in 4, lirmly and securely locking same therein while screwing the stud -l9 into other parts, When the stud bolt 1;9 is screwed V in place and to the desired depth, the rotation of the driving head is then reversed to the opposite direction, thus releasing the torsional pressure on the cams 5 and 12, allowing the locking disc 11 to rock to the other side of. the slot 6, releasing the pressure on the locking pin 15 against the end of the stud, bolt 19-, which leaves-the stud thimble 1 6 free to unscrew from the stud bolt. 'V'arious size-of thimb'les 16 may be inserted within the casing, for adapting the-driver to different size stud bolts. g

Having fully described our stud driver, what we claim as our invention and desire to secure by "Letters Patent is:

1. A stud driver adapted to a power machine ior setting threaded stud bolts into machine parts, "comprising a cylindrical driving head, means for attaching the said threaded cylindrical casing use of a power operating machine, comprising a cylindrical driving head having helical driving cams formed on one end thereof, a driving spindle projecting from the other end of said driving head, a hollow cylindrical casing attached to the end of said driving head and enclosing said driving cams thereon, a threaded stud driving thimble mounted in the end of said casing, a disc locking cam having helical slides formed thereon interposed between the driving cams on the end of the driving head and the stud driving thimble, means for attaching the said cam disc to the stud driving thimble, and means for locking a threaded stud bolt within the stud'driving thimble.

3. A stud driving device adapted for setting threaded stud bolts in machine parts by use of a poweroperating machine, comprising a threaded cylindrical driving head having projecting helical driving formed on one end thereof and a tapered driving spindle formed on the opposite end of said driving head, a hollow internally for connecting with the threaded portion of the said driving head, a cylindrical stud driving thimble movably mounted within the outer end of said driving head casing,said driving thimble having an opening through the center thereof and provided with internal threads for receiving a threaded stud bolt therein,

and supported therein by a projecting collar fixedly attached to the inner end of said thimble, a disc locking cam having helical slides formed on one side thereof for fitting and engaging the driving cams on the driving head, said cam being interposed between the said driving cams and the said stud driving thimble collar, a projecting driving bar formed on the side of the cam disc opposite the helical cam slides, for engaging and driving the stud driving thimble as the driving head is caused to rotate by the power operating machine, and means for locking the stud bolt within the threaded stud driving thimble.

4. A stud driver adapted for screwing and setting threaded stud bolts in machine parts, comprising a threaded cylindrical driving head having from one end thereof and a tapered driving spindle projecting from the other end of said driving head, a hollow cylindrical casing having internal threads therein for fitting and engaging the threaded section of the driving head, said casing being formed with a bearing at the outer end thereof and concentric with the axis of the driving spindle, and having a. shouldered support formed inside of said casing also concentric with the axis of the driving spindle and the casing bearing, a cylindrical stud driving thimble mounted in said casing bearing, said driving thimble having a supporting collar CEIIHS,

the end of a helical driving cams projecting formed thereon for engaging the'shouldered projection inside vthe casing, and having a rectangular groove formed across the face of said collar, a disc locking cam having helical slides formed on one side thereof corresponding to the helical driving cams on the end of said driving head, and a rectangular driving bar formed on the opposite side of said cam disc, interposed between the driving cams on the end of the driving head and the said stud driving thimble, and having the driving bar engagin the rectangular groove in the driving thin'ible collar, and a locking pin formed on said disc driving bar and projecting within the center threaded opening of the stud driving thimble.

' 5.A stud driving device adapted for screwing threaded studs into machine parts, comprising a threaded cylindrical driving head having two helical driving cams projecting from the threaded end thereof, said helical driving cams being positioned on opposite edges of the said driving head and are separated by a rectangular recess positioned diametrically across the end of said driving head, a tapered driving spindle formed on the opposite end of the driving head cylinder, a hollow cylindrical casing having internal threads therein for fitting and engaging the threaded section of the driving iead, said casing being formed with a bearing in the outer end thereof provided with an inside shoulder therein both concentric with the axis of the driving head and driving spindle, a hollow cylindrical stud driving thimble mounted within the end bearing of the driving head casing, and movable therein, said driving thimble having a thereof, a disclocking cam having two helical locking cam slides formed on one side thereof, 1nterposed between said drive cams von the end of the driving head and the'said stud driving thimble collar, said helical cam slides positioned on the opposite edges of the cam disc, but on the same side thereof, and separated by a small projecting tooth for engaging and moving within the rectangular recess on the end of the driving head, a driving bar formed on the disc locking cam across the side opposite the helical cam slides, for engaging the rectangular recess in the face of the stud driving thimble collar, a lock pin formed on the center ofthe disc driving bar for projecting into and engagin the hollow recess through the stud drivin; thimble.

LOUIS A. WEIL. CHARLES F. WEIL.

projecting collar formed on the inside end I 

